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Flea, tick, and worm issues are no longer limited to specific seasons. NexGard Spectra for Large Dogs offers one of the most complete parasite protection solutions available. With just one dose per month, it protects your dog against a variety of internal and external parasites in all seasons. This broad-spectrum treatment is effective against fleas, ticks, heartworms, intestinal worms, mange, and mites.
NexGard Spectra Purple flea, tick & worm treatment comes in a tasty beef-flavored chew, providing your dog with a treat-like experience every time. It's that simple and hassle-free. A single chew protects for a full 30 days; your dog is safe for a complete month, uninterrupted. NexGard Spectra heartworm chews for 33.0 – 66.0 lbs dogs are available in five different weight-specific packs, catering to dogs of all sizes. Buy NexGard Spectra Chews for a simple and effective way to keep your dog parasite-free, inside and out.
NexGard Spectra contains afoxolaner and milbemycin oxime as its active ingredients. After administration, the active components are absorbed into the dog's bloodstream. The formula causes overstimulation in the nervous systems of the relevant parasites, resulting in their death. Afoxolaner targets ectoparasites (fleas, ticks, and mites). Milbemycin oxime manages endoparasites (heartworm and intestinal worms) within your pet's digestive system and relevant organs.
According to the product label, NexGard Spectra kills fleas within 6-8 hours. It killed more than 90% of brown dog ticks and Asian longhorned ticks within 48 hours, as per studies referenced in the label.
| Dog Size | Dog Weight (lbs) | Pack Color | Afoxolaner (mg) | Milbemycin oxime (mg) | Dose Per Month |
| XSmall Dogs | 4.4 – 7.7 | Orange | 9.4 | 1.9 | One |
| Small Dogs | 7.7 – 16.5 | Yellow | 18.8 | 3.8 | One |
| Medium Dogs | 16.5 – 33.0 | Green | 37.5 | 7.5 | One |
| Large Dogs | 33.0 – 66.0 | Purple | 75.0 | 15.0 | One |
| XLarge Dogs | 66.0 – 132.0 | Red | 150.0 | 30.0 | One |
For dogs over 132.0 lbs, administer the appropriate combination of NexGard Spectra Chews.
NexGard Spectra is not for use in humans. You should keep these chews out of the reach of children, uninformed people, and pets. In case of accidental ingestion, immediately consult a physician. NexGard Spectra can be used in pregnant, breeding, or lactating female dogs. However, its safety has not been evaluated in breeding male dogs. These chews should be used with caution in dogs with a history of seizures or neurologic disorders.
Do not administer NexGard Spectra to puppies under 8 weeks of age or under 4.4 lbs of body weight. As it is an oral treatment, there are no restrictions on your dog’s swimming, bathing, and shampooing before or after the treatment.
Do not open the inner pouch until you are ready to use the treatment. Wash your hands thoroughly after handling.
Rated 4.7/5 based on 608 ratings
Nexgard Spectra made things simpler by handling multiple parasites together.
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Nexgard Spectra made things easier since it handles multiple parasites in one dose.
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Nexgard Spectra made things easier since it handles multiple parasites in one dose.
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Makes things simpler with one dose
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Ordered again after good first use.
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